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local vm = require 'vm'
local util = require 'utility'
local guide = require 'parser.guide'
local function getKey(src)
local key = vm.getKeyName(src)
if not key or #key <= 2 then
if not src.index then
return '[any]'
end
local class = vm.getClass(src.index)
if class then
return ('[%s]'):format(class)
end
local tp = vm.getInferType(src.index)
if tp then
return ('[%s]'):format(tp)
end
return '[any]'
end
local ktype = key:sub(1, 2)
key = key:sub(3)
if ktype == 's|' then
if key:match '^[%a_][%w_]*$' then
return key
else
return ('[%s]'):format(util.viewLiteral(key))
end
end
return ('[%s]'):format(key)
end
local function getField(src)
if src.parent.type == 'tableindex'
or src.parent.type == 'setindex'
or src.parent.type == 'getindex' then
src = src.parent
end
local tp = vm.getInferType(src)
local class = vm.getClass(src)
local literal = vm.getInferLiteral(src)
local key = getKey(src)
if type(literal) == 'string' and #literal >= 50 then
literal = literal:sub(1, 47) .. '...'
end
return key, class or tp, literal
end
local function buildAsHash(classes, literals)
local keys = {}
for k in pairs(classes) do
keys[#keys+1] = k
end
table.sort(keys)
local lines = {}
lines[#lines+1] = '{'
for _, key in ipairs(keys) do
local class = classes[key]
local literal = literals[key]
if literal then
lines[#lines+1] = (' %s: %s = %s,'):format(key, class, literal)
else
lines[#lines+1] = (' %s: %s,'):format(key, class)
end
end
lines[#lines+1] = '}'
return table.concat(lines, '\n')
end
local function buildAsConst(classes, literals)
local keys = {}
for k in pairs(classes) do
keys[#keys+1] = k
end
table.sort(keys, function (a, b)
return tonumber(literals[a]) < tonumber(literals[b])
end)
local lines = {}
lines[#lines+1] = '{'
for _, key in ipairs(keys) do
local class = classes[key]
local literal = literals[key]
if literal then
lines[#lines+1] = (' %s: %s = %s,'):format(key, class, literal)
else
lines[#lines+1] = (' %s: %s,'):format(key, class)
end
end
lines[#lines+1] = '}'
return table.concat(lines, '\n')
end
local function mergeLiteral(literals)
local results = {}
local mark = {}
for _, value in ipairs(literals) do
if not mark[value] then
mark[value] = true
results[#results+1] = value
end
end
if #results == 0 then
return nil
end
table.sort(results)
return table.concat(results, '|')
end
return function (source)
local literals = {}
local classes = {}
local intValue = true
vm.eachField(source, function (src)
local key, class, literal = getField(src)
if not classes[key] then
classes[key] = {}
end
if not literals[key] then
literals[key] = {}
end
classes[key][#classes[key]+1] = class
literals[key][#literals[key]+1] = literal
if class ~= 'integer'
or not literals[key]
or #literals[key] ~= 1 then
intValue = false
end
end)
for key, class in pairs(classes) do
classes[key] = guide.mergeTypes(class)
literals[key] = mergeLiteral(literals[key])
end
if classes['[any]'] == 'any' then
classes['[any]'] = nil
end
if not next(classes) then
return '{}'
end
if intValue then
return buildAsConst(classes, literals)
else
return buildAsHash(classes, literals)
end
end
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